Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
MATRIX PARTNERS VI LP ET AL
  2. Issuer Name and Ticker or Trading Symbol
NETEZZA CORP [NZ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
C/O MATRIX PARTNERS, BAY COLONY CORP CTR, 1000 WINTER STREET, SUITE 4500
3. Date of Earliest Transaction (Month/Day/Year)
07/24/2007
(Street)

WALTHAM, MA 02451
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 07/24/2007   C   2,528,750 A (1) 2,608,677 I See Footnote (2)
Common Stock 07/24/2007   C   843,625 A (1) 870,290 I See Footnote (3)
Common Stock 07/24/2007   C   282,625 A (1) 291,558 I See Footnote (4)
Common Stock 07/24/2007   C   1,847,931 A (1) 4,456,608 I See Footnote (2)
Common Stock 07/24/2007   C   616,494 A (1) 1,486,784 I See Footnote (3)
Common Stock 07/24/2007   C   206,534 A (1) 498,092 I See Footnote (4)
Common Stock 07/24/2007   C   961,012 A (1) 5,417,620 I See Footnote (2)
Common Stock 07/24/2007   C   320,607 A (1) 1,807,391 I See Footnote (3)
Common Stock 07/24/2007   C   107,407 A (1) 605,499 I See Footnote (4)
Common Stock 07/24/2007   C   289,725 A (1) 5,707,345 I See Footnote (2)
Common Stock 07/24/2007   C   96,656 A (1) 1,904,047 I See Footnote (3)
Common Stock 07/24/2007   C   32,381 A (1) 637,880 I See Footnote (4)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number. SEC 1474 (9-02)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Series A Convertible Preferred Stock (1) 07/24/2007   C     5,057,500   (1)   (5) Common Stock 2,528,750 (1) $ 0 0 I See Footnote (2)
Series A Convertible Preferred Stock (1) 07/24/2007   C     1,687,250   (1)   (5) Common Stock 843,625 (1) $ 0 0 I See Footnote (3)
Series A Convertible Preferred Stock (1) 07/24/2007   C     565,250   (1)   (5) Common Stock 282,625 (1) $ 0 0 I See Footnote (4)
Series B Convertible Preferred Stock (1) 07/24/2007   C     3,695,863   (1)   (5) Common Stock 1,847,931 (1) $ 0 0 I See Footnote (2)
Series B Convertible Preferred Stock (1) 07/24/2007   C     1,232,989   (1)   (5) Common Stock 616,494 (1) $ 0 0 I See Footnote (3)
Series B Convertible Preferred Stock (1) 07/24/2007   C     413,068   (1)   (5) Common Stock 206,534 (1) $ 0 0 I See Footnote (4)
Series C Convertible Preferred Stock (1) 07/24/2007   C     1,922,025   (1)   (5) Common Stock 961,012 (1) $ 0 0 I See Footnote (2)
Series C Convertible Preferred Stock (1) 07/24/2007   C     641,214   (1)   (5) Common Stock 320,607 (1) $ 0 0 I See Footnote (3)
Series C Convertible Preferred Stock (1) 07/24/2007   C     214,815   (1)   (5) Common Stock 107,407 (1) $ 0 0 I See Footnote (4)
Series D Convertible Preferred Stock (1) 07/24/2007   C     579,451   (1)   (5) Common Stock 289,725 (1) $ 0 0 I See Footnote (2)
Series D Convertible Preferred Stock (1) 07/24/2007   C     193,312   (1)   (5) Common Stock 96,656 (1) $ 0 0 I See Footnote (3)
Series D Convertible Preferred Stock (1) 07/24/2007   C     64,763   (1)   (5) Common Stock 32,381 (1) $ 0 0 I See Footnote (4)

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
MATRIX PARTNERS VI LP ET AL
C/O MATRIX PARTNERS, BAY COLONY CORP CTR
1000 WINTER STREET, SUITE 4500
WALTHAM, MA 02451
    X    

Signatures

 By: Matrix VI Management Co., L.L.C. /s/ Paul J. Ferri By: Paul J. Ferri, Managing Member   07/26/2007
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) The Series A, Series B, Series C, and Series D Convertible Preferred Stock converted into Common Stock on a 1-for-2 basis upon the closing of the Issuer?s initial public offering without payment of consideration.
(2) These securities are owned solely by Matrix Partners VI, L.P. Matrix VI Management Co., L.L.C. is the general partner of Matrix Partners VI, L.P. Paul Ferri, as a Managing Member of Matrix VI LLC, has sole voting and dispositive power with respect to the shares held by those entities. Mr. Ferri disclaims beneficial ownership of such shares, except to the extent of his pecuniary interest therein.
(3) These securities are owned solely by Matrix VI Parallel Partnership-A, L.P. Matrix VI Management Co., L.L.C. is the general partner of Matrix VI Parallel Partnership-A, L.P. Paul Ferri, as a Managing Member of Matrix VI LLC, has sole voting and dispositive power with respect to the shares held by those entities. Mr. Ferri disclaims beneficial ownership of such shares, except to the extent of his pecuniary interest therein.
(4) These securities are owned solely by Matrix VI Parallel Partnership-B, L.P. Matrix VI Management Co., L.L.C. is the general partner of Matrix VI Parallel Partnership-B, L.P. Paul Ferri, as a Managing Member of Matrix VI LLC, has sole voting and dispositive power with respect to the shares held by those entities. Mr. Ferri disclaims beneficial ownership of such shares, except to the extent of his pecuniary interest therein.
(5) Not applicable.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.